Reserved words are part of the Pascal language, and as such, cannot be redefined by the
programmer. Throughout the syntax diagrams they will be denoted using a bold typeface. Pascal is
not case sensitive so the compiler will accept any combination of upper or lower case letters for
reserved words.

We make a distinction between Turbo Pascal and Delphi reserved words. In TP mode, only the
Turbo Pascal reserved words are recognised, but the Delphi ones can be redefined. By default, Free
Pascal recognises the Delphi reserved words.